Indium-Bearing Chalcopyrite and Sphalerite from the Gåsborn Area, West Bergslagen, Central Sweden

Kees Kieft and Arend H. Damman
Institute of Earth Sciences, Free University, de Boelelaan 1085, 1081 HV Amsterdam, The Netherlands

Abstract: In the Gåsborn area, West Bergslagen, central Sweden, Fe-rich, indium-bearing (0.1–2.0wt.% In) sphalerite is replaced by Fe-poor sphalerite containing minute inclusions of chalcopyrite, roquesite and an unnamed In-Zn-rich phase. Fe-rich, In-bearing sphalerite is primary; indium occurs as a roquesite molecule in solid solution. Fe-poor sphalerite, roquesite, chalcopyrite and the unnamed In-Zn-rich phase were formed from In-bearing sphalerite by secondary processes, characterized by the so-called ‘chalcopyrite disease’.

Keywords: sphalerite • indium • chalcopyrite disease • Gåsborn, Sweden

Mineralogical Magazine; March 1990 v. 54; no. 374; p. 109-112; DOI: 10.1180/minmag.1990.054.374.12
© 1990, The Mineralogical Society
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